Mental Flosshttp://mentalfloss.com/node/49072/atom.xml2015-03-03T20:24:46+00:00http://mentalfloss.com/article/49072/missing-links-when-animals-used-be-put-trial2013-02-21T20:30:56+00:002013-02-21T20:32:01+00:00The Missing Links: When Animals Used to Be Put On TrialColin Perkins